Comments:
A free form long oval Lightning Ridge Black opal of mixed colour and pattern from broad flash of Orange greens and blues to pinfire and segmented patterns in Orange and green and blue the opal has a dark grey base with an overall green hue it has black potch lines in the surface as well as the base colour. The surface is carved and undulating throwing various flashes of multi colour

Opal valuation: Our Opal Valuations
are a combination of experience gathered over 35+ years in all levels and
operations within the opal industry and the internationally recognized Opal
Nomenclature and Classification

Photographing opals: We endeavour at all times to
take the most true to life pictures possible. However, cameras often pick up
colours and light differently and variations may occur. Because every opal
photographs differently, I also include in the description additional comments
about the accuracy of the photos.

Our Guarantee: We sell quality opal and customer satisfaction
is important to us so for any reason you are not completely happy with your
purchase in any way whatsoever please contact us before leaving feedback as I
am happy for you to return it for a full refund or another arrangement.

About Colonial Opal The company origins in trading Opal, Pearl and Precious Gems date from
the early 1980s experience gathered in all levels and operations within the Opal
Industry starting in the Wholesale and Export Gemstone and Jewellery trade
within Australia and Internationally then Owning and Operating Opal
Specialist Stores in Australia and New Zealand all the while being involved in
the Mining, Cutting and Valuing all varieties of Australian Opal

Lightning Ridge Opal: Mined in the Outback of New South Wales Australia Black Opal comes from
and variety of mining areas around Lightning Ridge

Black Opal refers to the underlying colour – the
colour of the opal when you turn it over. The darker the body the more valuable
to stone may be. It is this darkness that lends brightness to the other colours
displayed with in the stone. Black and dark opal is the scarcest of all opal
and comes from the mines of Lightning Ridge.

Boulder opal is a type
of opal that forms within the cavities of ironstone boulders dating from the
time when central Queensland was cover by an inland sea The Opal is found in
both vertical and horizontal cracks or seams. It is cut with the ironstone
remaining on the back and is classified as solid opal.

Boulder Opal occurs
over a Vast area of Western Queensland from North of Winton to south of
Quilpie. Boulder Opal is considered to be one of the most versatile opals
because it has all of the colour and patterns of expensive black or crystals
opals but it is contained within the iron stone which makes it extremely
durable.

When looked at from
the side you can always tell a genuine solid boulder opal by the natural uneven
line where the opal filled the void in the boulder.

White Opal: is also known as milky Opal and it has a pale white
appearance with bright flashes of Opal colour. On the body tone and brightness
chart the body colour of white Opal is N8 or N9. White Opal is capable of
displaying any combination of spectral colours such as red, blue, purple and
greens.

The major difference
between this type of Opal and the Black Opal is that white Opal tends to have a
subdued play of colour since the body colour of the stone is light. In black
Opal because the body is very dark the play of colour is much brighter.

In terms of production
the white Opal is by far the most plentiful. In Australia the majority of the
opal produced comes from South Australia. There are three main South Australian
opal mining fields these are Coober Pedy, Andamooka and Mintabie